#pragma once

#include <string>
#include <vector>

namespace cpp14 {

[[nodiscard]] auto apply_twice(const std::vector<int>& values) -> std::vector<int>;
[[nodiscard]] auto concat_any(const std::vector<std::string>& a, const std::vector<std::string>& b)
    -> std::vector<std::string>;

}  // namespace cpp14